CN108511093B - A kind of PWR Fuel cluster high-temperature heating clamping experimental provision - Google Patents
A kind of PWR Fuel cluster high-temperature heating clamping experimental provision Download PDFInfo
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- CN108511093B CN108511093B CN201810338610.0A CN201810338610A CN108511093B CN 108511093 B CN108511093 B CN 108511093B CN 201810338610 A CN201810338610 A CN 201810338610A CN 108511093 B CN108511093 B CN 108511093B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/06—Magazines for holding fuel elements or control elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
A kind of PWR Fuel cluster high-temperature heating clamping experimental provision, including reactor 3*3 cluster, cluster is arranged in high temperature smelting furnace and is gripped by upper end and the high temperature rhenium molybdenum electrode of lower end two, and rhenium molybdenum electrode is made of first electrode collet, second electrode collet and rhenium molybdenum plate；One end of rhenium molybdenum plate is provided with the first electrode collet and second electrode collet matched；A half slot is offered on first electrode collet and second electrode collet, first electrode collet and second electrode collet are installed together, and round hole are cooperatively formed, for clamping the conductive cap on fuel bundle top.When being tested in the present invention, when molten material drops to electrode, only need to change first electrode collet and second electrode collet, rhenium molybdenum plate does not need to replace, it is lost caused by the reduction of high degree is damaged, overcomes and need to replace that rhenium molybdenum electrode bring is at high cost, the big problem of loss to electrode damage in the prior art.
Description
Technical field
The present invention relates to reactor core behavioral trait studying technological domains under the conditions of reactor disaster, and in particular to a kind of pressure
Water-water reactor fuel bundle high-temperature heating clamping experimental provision.
Background technique
The development process of reactor disaster is that a gas, liquid, solid coexist, and a variety of physical materials intersect one combined
Complicated physical and chemical process.The process includes early oxidation, eutectic phenomena and reactor fuel stick candleization, and reactor core runner is stifled
Plug, the formation of reactor core fusion pool, fusion pool rupture flow into the processes such as lower head.Wherein, the candle of reactor core fuel rod, with
And the blocking of reactor core runner, the formation of reactor core fusion pool, it is the key link for studying major accident sequence.This process, Neng Gouwei
Reactor disaster analysis inside and outside heap provides source item, and development can cause prestige to the integrality of reactor pressure vessel
The side of body, and can determine the generation of hydrogen and the migration of fission product.Meanwhile it the candle of reactor internal combustion charge bar and migrating
The research of journey is also most important.The candle and transition process of reactor core fuel rod can be the mistake of reactor pressure vessel
Effect analysis provides parameter.The core meltdown of reactor is a non-linear non-coherent physical process, it is along in high temperature height
The fusing and candleization of reactor core material in the case where pressure.Reactor fuel rod involucrum oxidation process can discharge heat, improve
The temperature of reactor core；But aoxidize zirconium cladding layer and the physical property of material can be improved, delay the transition process of fusant.In order to grind
Study carefully this process, needs to carry out relevant experimental study.In experimentation, the In-pile meltdown object of reactor can be in different physics
Space is cooled and is solidified in different temperature environments, damaged to clamping device, and folder must be replaced by carrying out subsequent experimental
Device is held, since clamping device is rhenium molybdenum electrode, if replacement, will cause the raising of cost.In addition, existing rhenium molybdenum electrode is
Plate forms irregular hole, clamps to fuel rod, cause contact area ratio by squeezing two rhenium molybdenum plates
Smaller, resistance is larger, may damage to electrode.In addition, existing experiment is directed to single fuel rod, can not study
Influencing each other between the blocking of reactor core runner, fuel rod.
Summary of the invention
To solve the above problems, the object of the present invention is to provide PWR Fuel sticks under the conditions of a kind of reactor disaster
Beam high-temperature heating clamping experimental provision, which can replace, under the conditions of improving reactor disaster
The accuracy of reactor core behavioral trait research, reduces the loss repeated in experimentation, and can study under severe accident conditions
Influencing each other between more fuel rods.
To achieve the above object, the present invention adopts the following technical scheme that:
A kind of PWR Fuel cluster high-temperature heating clamping experimental provision, is used to press from both sides including being arranged in high temperature smelting furnace
The rhenium molybdenum electrode of fuel rod is held, rhenium molybdenum electrode is made of first electrode collet, second electrode collet and rhenium molybdenum plate；The one of rhenium molybdenum plate
End is provided with the first electrode collet and second electrode collet matched；It is opened up on first electrode collet and second electrode collet
There is a half slot, first electrode collet and second electrode collet are installed together, and round hole are cooperatively formed, for clamping fuel
The conductive cap on cluster top.
A further improvement of the present invention lies in that the both ends of first electrode collet and second electrode collet are offered through circle
Hole, by pass through first electrode collet and second electrode collet one end the bolt through circular hole by first electrode collet and the
Two terminal clamps are fixed, and first electrode collet is fixed on rhenium using the circular hole that runs through that bolt passes through the first electrode collet other end
On molybdenum plate, the second electrode collet other end first electrode collet is fixed on rhenium molybdenum plate through circular hole is passed through using bolt.
A further improvement of the present invention lies in that fuel bundle is arranged using 9 fuel rods by 3 × 3 modes, every fuel
The cross-sectional diameter of stick is 12mm, and the distance between two neighboring fuel rod is 1.5mm, is had below fuel bundle for containing
Fuel rod falls the crucible of fusant.
A further improvement of the present invention lies in that every fuel rod length is 0.9m, fuel rod includes being located at center and diameter
For the W-Re heating rod of 3mm, the alumina tube that W-Re heating rod outside is thickness 3.5mm, and alumina tube heats W-Re
Stick package, the zirconium -4 alloy pipe that alumina tube outside is thickness 1mm, and zirconium -4 alloy pipe wraps up alumina tube, every combustion
Conductive cap is provided at the top of charge bar；9 through-holes are offered on conductive plate, the conductive cap on the top of 9 fuel rods both passes through logical
Hole, the height positioned at the conductive cap on the top of a fuel rod at fuel bundle center are greater than leading for other 8 fuel rod tops
The height of electric cap, rhenium molybdenum electrode clamp the conductive cap on the top of a centrally located fuel rod.
A further improvement of the present invention lies in that being provided between conductive cap at the top of every fuel rod and at the top of the fuel rod
Insulation spacer.
A further improvement of the present invention lies in that the radius of the conductive cap on the top of a centrally located fuel rod is 5mm,
Diameter is 10.5mm, and the diameter for the round hole that first electrode collet and second electrode collet cooperatively form is 10.0mm.
A further improvement of the present invention lies in that high temperature smelting furnace includes furnace body, furnace body be it is columnar structured, internal diameter is
1.0m is highly 1.5m, wall thickness 0.01m；The bell of arc is provided at the top of furnace body, bell is to offer on arc bell
Second water outlet, argon gas export and the second water inlet；The first water inlet and argon gas import, furnace body are offered on bottom of furnace body side wall
Bottom is provided with the lid that can be rotated；Fuel bundle is vertically arranged in furnace body.
A further improvement of the present invention lies in that offering 6 observation windows on sidewall of the furnace body, 6 observation windows are along sidewall of the furnace body
Spiral escalation arrangement, the distance of two adjacent observation windows in the vertical direction are 0.16m, and 6 observation windows are along sidewall of the furnace body
Circumferentially it is uniformly distributed；The thermocouple jack for installing thermocouple is offered at each observation window, thermocouple is using W-Re warm
Galvanic couple.
A further improvement of the present invention lies in that furnace body uses zirconia material, molybdenum is provided in the furnace body of high temperature smelting furnace
Shield, is provided with water layer on inboard wall of furnace body, cooling tower is connected with water dispenser, and water dispenser is connected with water layer；It is fuel in molybdenum shield
Stick region, is provided with high temperature insulating layer between molybdenum shield and water layer, high temperature insulating layer uses zirconia heat insulation material；High temperature insulating layer
It is supported using the molybdenum plate of annular.
A further improvement of the present invention lies in that being provided with mechanical pump and lobe pump, mechanical pump and sieve on the outside of high temperature smelting furnace
Thatch pump is connected, and lobe pump is connected with high-temperature fusion furnace interior, and rhenium molybdenum electrode one end is located in high temperature smelting furnace, and one end is located at height
Outside warm melting furnace, one end that rhenium molybdenum electrode is located at outside high temperature smelting furnace is connected with water cooling copper electrode.
Compared with prior art, the invention has the benefit that
By the way that the first electrode collet and second electrode collet that match, first electrode are arranged on rhenium molybdenum plate in the present invention
The conductive cap on the circular hole clamping fuel bundle top that collet and second electrode collet are formed, when being tested, molten material drop
When dropping down onto electrode, first electrode collet and second electrode collet are only needed to change, rhenium molybdenum plate does not need to replace, by subtracting for high degree
It is lost caused by few damage, overcomes and need to replace that rhenium molybdenum electrode bring is at high cost, loss to electrode damage in the prior art
Big problem.
Further, the radius of the conductive cap on the top of a centrally located fuel rod be 5mm, diameter 10.5mm,
The diameter for the circular hole that first electrode collet and second electrode collet are formed is 10.0mm, using the rhenium molybdenum electrode collet in the present invention
With conductive cap, reduce contact resistance, the reduction of high degree leads to the possibility of electrode burn since electric current is excessive.
Further, fuel bundle setting is in high-temperature fusion furnace interior, by the W-Re heating rod to fuel rod center into
Row electric heating, the decay heat during mock-up reactor major accident, maximum heating temperature reach 2000 DEG C, can real simulation it is anti-
Answer fuel rod candleization behavior under heap severe accident conditions.
Further, the fuel rod in the present invention can both be studied either single be also possible to more fuel bundles
The behavior of single fuel rod can also study the situation that influences each other between multiple fuel rods.
Detailed description of the invention
Fig. 1 is high temperature smelting furnace schematic diagram.
Fig. 2 is fuel rod schematic diagram.
Fig. 3 is fuel rod top view.
Fig. 4 is fuel bundle schematic three dimensional views.
Fig. 5 is fusant candleization experimental provision plan view.
Fig. 6 is the main view of rhenium molybdenum electrode.
Fig. 7 is the top view of rhenium molybdenum electrode.
In figure, 1 is the first water inlet, and 2 be argon gas import, and 3 be molybdenum plate, and 4 be fuel rod, and 5 be furnace body, and 6 be observation window, 7
It is bell for the first water outlet, 8,9 be the second water outlet, and 10 be argon gas export, and 11 be the second water inlet, and 12 be water-cooled copper electricity
Pole, 13 be high temperature insulating layer, and 14 be molybdenum shield, and 15 be thermocouple, and 16 be rhenium molybdenum electrode, and 17 be crucible, and 18 be water layer, and 19 be oxidation
Aluminium block, 20 be lid, and 21 be conductive cap, and 22 be insulation spacer, and 23 be zirconium -4 alloy pipe, and 24 be alumina tube, and 25 add for W-Re
Hot pin, 26 be cooling tower, and 27 be water dispenser, and 28 be mechanical pump, and 29 be lobe pump, and 30 be weak-current cable ditch, and 31 be argon gas system
System, 32 be PLC technology cabinet, and 33 be qin formula station, and 34 be 100KW incoming line cabinet, and 35 be power regulating eqiupment, and 36 be high temperature smelting furnace,
37 is, through circular hole, 38 are rhenium molybdenum plate, and 39 be first electrode collet, and 40 be second electrode collet, and 41 be round hole.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing.
Referring to Fig. 1-Fig. 7, PWR Fuel cluster high-temperature heating clamping experimental provision of the invention, including high temperature smelting furnace
And fuel bundle and rhenium molybdenum electrode that high-temperature fusion furnace interior is set etc..
Referring to Fig. 1, high temperature smelting furnace includes furnace body 5, and it is highly 1.5m that furnace body 5, which is columnar structured, internal diameter 1.0m,
Wall thickness is 0.01m.The bell 8 of arc is provided at the top of furnace body 5, bell 8 is the design of arc, it can be improved bearing capacity,
The second water outlet 9, argon gas export 10 and the second water inlet 11 are offered on bell 8.Be provided in furnace body 5 be used to support high temperature every
The molybdenum plate 3 of thermosphere 13.6 observation windows, 6,6 observation windows 6 are offered on 5 side wall of furnace body to arrange along 5 side wall spiral escalation of furnace body
Cloth, the distance of two adjacent observation windows 6 in the vertical direction are 0.16m, and 6 observation windows 6 circumferentially uniformly divide along 5 side wall of furnace body
Cloth.The thermocouple jack for installing thermocouple 15 is offered at each observation window 6, thermocouple 15 uses Wolfram rhenium heat electric couple.
The first water inlet 1 and argon gas import 2 are offered in 5 bottom sidewall of furnace body, argon gas import 2 may be flowed into argon at experiment initial stage
Gas provides argon gas protection for experiment fusion process, to guarantee the safety of high temperature melting process.5 bottom of furnace body is provided with rotatable
Lid 20.Center vertical is provided with fuel bundle in furnace body 5, and fuel bundle includes several fuel rods.
Specifically, fuel bundle is arranged using 9 fuel rods by 3*3 (* indicates multiplication sign) mode as shown in Figure 4.Often
The cross-sectional diameter of root fuel rod is 12mm, and the distance between two neighboring fuel rod is 1.5mm, by reasonably arranging thermoelectricity
Even measurement obtains the transient parameters such as the clad temperature, fusant and vapor Temperature of Working of each fuel rod.By the way that several height are arranged
Fast video camera records experimentation from different directions, records core material melts and fusant transport dynalnics characteristic comprehensively, is existing
There is procedural model amendment to provide experimental data.There is the crucible 17 that fusant is fallen for containing fuel rod 4 in the lower section of fuel rod 4.
It can be moved by fusant in the true reflection fusion process such as fusant position distribution in crucible 17 and quality after experiment
Move the behavioral trait for eventually disengaging from fuel rod.Crucible 17 is arranged in alumina block 19, and alumina block 19 is arranged on the lid 20.
The structure of single fuel rod is as shown in Figures 2 and 3, and 4 length of fuel rod is 0.9m, and fuel rod 4 includes being located at center
And W-Re heating rod 25 that diameter is 3mm, on the outside of W-Re heating rod 25 be the alumina tube 24 of thickness 3.5mm, and aoxidize
Aluminum pipe 24 wraps up W-Re heating rod 25, is the zirconium -4 alloy pipe 23 of thickness 1mm on the outside of alumina tube 24, and zirconium -4 alloy pipe
23 wrap up alumina tube 24, are provided with conductive cap 21 at the top of every fuel rod 4.
As shown in figure 4, offering 9 through-holes on conductive plate, the conductive cap on the top of 9 fuel rods 4 passes through through-hole, is located at
The height of the conductive cap on the top of a piece fuel rod at 9 conductive cap centers is greater than the conductive cap on other 8 fuel rod tops
Highly, the conductive cap on the top of a fuel rod of 16 Clamping Center of rhenium molybdenum electrode.At the top of every fuel rod between conductive cap
It is provided with insulation spacer 22.
By being electrically heated to centrally located W-Re heating rod 25, analog fuel stick decay heat, experiment heating highest
Temperature is up to 2000 DEG C.
Referring to Fig. 1, furnace body 5 uses zirconia material, can bear 2000 DEG C or more of high temperature.The furnace body of high temperature smelting furnace
Be provided with molybdenum shield 14 in 5, water layer 18 be provided on 5 inner wall of furnace body, cooling tower 26 is connected with water dispenser 27, water dispenser 27 with
Water layer 18 is connected.It is fuel rod region in molybdenum shield 14, high temperature insulating layer 13, high temperature insulating is provided between molybdenum shield 14 and water layer 18
Layer 13 uses zirconia heat insulation material, to keep the temperature of experimental situation and guarantee experimenter's safety.On high temperature insulating layer 13
Part is punched, for arranging that visualizing saturating window 6 and Wolfram rhenium heat electric couple, Kong Gaowei 35mm, width 35mm, Wolfram rhenium heat electric couple level sets
It sets, and passes through hole.Wolfram rhenium heat electric couple hot end is contacted with 24 surface of alumina tube, and cold end exports external environment by saturating window and hole
In, temperature meets cold end requirement.Thermocouple is fixed using preceding advanced rower, passes through 24 surface of thermocouple real-time measurement alumina tube
Curve is simultaneously presented at qin formula station 33 for detection by data collection system by temperature.High temperature insulating layer 13 is using annular
Molybdenum plate 3 supports.
Referring to Fig. 5, mechanical pump 28 and lobe pump 29, power regulating eqiupment 35 and water cooling copper electrode are provided on the outside of high temperature smelting furnace 36
12 are connected.When experiment carries out, it is connected by mechanical pump 28 with lobe pump 29, is connected inside lobe pump 29 and high temperature smelting furnace 36
It is logical, high temperature smelting furnace 36 is vacuumized using two-stage pump, argon system 31 starts therewith after vacuum degree reaches setting value in furnace.
The argon gas of constant flow rate from furnace bottom be passed through in melting furnace up to furnace pressure reaches 1.2MPa.Then, 100kW incoming line cabinet 34 is defeated
220V alternating current is lower than the low-voltage AC of 36V by the output of power regulating eqiupment 35 out, and the water cooled copper electrode 12 of alternating current passes through rhenium
Molybdenum electrode 16 flows into W-Re heating rod 25.The output signals such as temperature and graph data are entered programmable by weak-current cable ditch 30
Control cabinet (PIC) 32 simultaneously finally exports on computer monitor in real time.High temperature smelting furnace mainly realizes the quantitative heating to fuel
And fuel rod is melted, the design of melting furnace carries out the high temperature melting process for surpassing 2000 DEG C safely.Fusing generates
High-temperature molten can be migrated in fuel rod surface candleization, and recorded by high-speed camera instrument thoroughly outside window, the saturating window in furnace wall
It can be designed so that entire candleization process visualization.
Referring to Fig. 6 and Fig. 7, rhenium molybdenum electrode 16 is made of first electrode collet 39, second electrode collet 40 and rhenium molybdenum plate 38.
One end of rhenium molybdenum plate 38 is provided with the first electrode collet 39 and second electrode collet 40 cooperated up and down；39 He of first electrode collet
6 are provided on second electrode collet 40Run through circular hole 37, open up on first electrode collet 39 and second electrode collet 40
Having a radius is the semicircle of 5mm, and first electrode collet 39 and second electrode collet 40 are installed together, and cooperatively forms round hole
41, for clamp a centrally located fuel rod top conductive cap.
38 other end of rhenium molybdenum plate is provided with 2Run through circular hole 37.When assembly, by first electrode collet 39 and second
The circular hole that terminal clamp 40 is formed clamps the conductive cap on the top of a centrally located fuel rod.
The radius of the conductive cap on the top of a centrally located fuel rod is 5mm, diameter 10.5mm, first electrode folder
First 39 and second electrode collet 40 formed circular hole diameter be 10.0mm, be slightly less than 21 diameter of conductive cap, this by increase contact
Area reduces contact resistance.The first electrode collet 39 and second electrode collet 40 of rhenium molybdenum electrode 16 are fixed by 6 bolts, when
After the fusant that generates drops to first electrode collet 39 and second electrode collet 40 when fuel rod melts, left side the need to be only opened
Bolt between one terminal clamp 39 and second electrode collet 40 replaces collet, and the rhenium molybdenum plate 38 on right side can be used for a long time.
16 other end of rhenium molybdenum electrode is connected by two bolts with water cooling copper electrode 12, and W-Re heating rod 25 is located at melting furnace
Center.By electric heating, fuel rod cluster material will melt under 2000 DEG C or more of hot conditions to be migrated.It is saturating through furnace wall
The dynamic process of window, fusing can be observed and be recorded in real time, and experimental data can provide verifying for conventional numeric analogy method, be reduced existing
There is the uncertainty of Analysis Codes of Severe Accident.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
A specific embodiment of the invention is only limitted to this, for those of ordinary skill in the art to which the present invention belongs, is not taking off
Under the premise of from present inventive concept, several simple deduction or replace can also be made, all shall be regarded as belonging to the present invention by institute
Claims of submission determine scope of patent protection.
Claims (7)
1. a kind of PWR Fuel cluster high-temperature heating clamping experimental provision, which is characterized in that including being arranged in high temperature smelting furnace
The interior rhenium molybdenum electrode (16) for being used to clamp fuel rod, rhenium molybdenum electrode (16) is by first electrode collet (39), second electrode collet
(40) and rhenium molybdenum plate (38) forms；One end of rhenium molybdenum plate (38) is provided with the first electrode collet (39) matched and second electrode
Collet (40)；A half slot, first electrode collet are offered on first electrode collet (39) and second electrode collet (40)
(39) it is installed together with second electrode collet (40), cooperatively forms round hole (41), for clamping leading for fuel bundle top
Electric cap；
Fuel bundle is arranged by 3 × 3 modes using 9 fuel rods, and the cross-sectional diameter of every fuel rod is 12mm, and adjacent two
The distance between a fuel rod is 1.5mm, has the crucible (17) that fusant is fallen for containing fuel rod below fuel bundle；
Every fuel rod (4) length is 0.9m, and fuel rod (4) includes the W-Re heating rod (25) that positioned at center and diameter is 3mm,
It is the alumina tube (24) of thickness 3.5mm on the outside of W-Re heating rod (25), and alumina tube (24) is by W-Re heating rod (25)
Package, is the zirconium -4 alloy pipe (23) of thickness 1mm on the outside of alumina tube (24), and zirconium -4 alloy pipe (23) is by alumina tube
(24) it wraps up, is provided with conductive cap (21) at the top of every fuel rod (4)；9 through-holes, 9 fuel rods are offered on conductive plate
(4) conductive cap on top both passes through through-hole, positioned at the height of the conductive cap on the top of a fuel rod at fuel bundle center
Greater than the height of the conductive cap on other 8 fuel rod tops, rhenium molybdenum electrode (16) clamps the top of a centrally located fuel rod
The conductive cap at end；
High temperature smelting furnace includes furnace body (5), and it is highly 1.5m, wall thickness is that furnace body (5), which is columnar structured, internal diameter 1.0m,
0.01m；The bell (8) of arc is provided at the top of furnace body (5), bell (8) is to offer the second water outlet on arc bell (8)
(9), argon gas export (10) and the second water inlet (11)；Offered in furnace body (5) bottom sidewall the first water inlet (1) and argon gas into
Mouth (2), furnace body (5) bottom is provided with the lid (20) that can be rotated；Fuel bundle is vertically arranged in furnace body (5).
2. a kind of PWR Fuel cluster high-temperature heating clamping experimental provision according to claim 1, which is characterized in that the
The both ends of one terminal clamp (39) and second electrode collet (40) are offered through circular hole (37), are pressed from both sides by passing through first electrode
The bolt through circular hole (37) of one end of head (39) and second electrode collet (40) is electric by first electrode collet (39) and second
Pole collet (40) is fixed, runs through circular hole (37) for first electrode collet across first electrode collet (39) other end using bolt
(39) it is fixed on rhenium molybdenum plate (38), circular hole (37) is run through for first across second electrode collet (40) other end using bolt
Terminal clamp (39) is fixed on rhenium molybdenum plate (38).
3. a kind of PWR Fuel cluster high-temperature heating clamping experimental provision according to claim 1, which is characterized in that every
Insulation spacer (22) are provided between conductive cap at the top of root fuel rod and at the top of the fuel rod.
4. a kind of PWR Fuel cluster high-temperature heating clamping experimental provision according to claim 3, which is characterized in that position
In the radius of the conductive cap on the top of a fuel rod at center be 5mm, diameter 10.5mm, first electrode collet (39) and the
The diameter for the round hole (41) that two terminal clamps (40) cooperatively form is 10.0mm.
5. a kind of PWR Fuel cluster high-temperature heating clamping experimental provision according to claim 1, which is characterized in that furnace
6 observation windows (6) are offered on body (5) side wall, 6 observation windows (6) are arranged along furnace body (5) side wall spiral escalation, adjacent
The distance of two observation windows (6) in the vertical direction is 0.16m, and 6 observation windows (6) are circumferentially uniformly distributed along furnace body (5) side wall；
The thermocouple jack for installing thermocouple (15) is offered at each observation window (6), thermocouple (15) uses W-Re thermoelectricity
It is even.
6. a kind of PWR Fuel cluster high-temperature heating clamping experimental provision according to claim 5, which is characterized in that furnace
Body (5) uses zirconia material, is provided with molybdenum shield (14) in the furnace body (5) of high temperature smelting furnace, is provided with water on furnace body (5) inner wall
Layer (18), cooling tower (26) are connected with water dispenser (27), and water dispenser (27) is connected with water layer (18)；It is combustion in molybdenum shield (14)
Charge bar region is provided with high temperature insulating layer (13) between molybdenum shield (14) and water layer (18), and high temperature insulating layer (13) uses zirconium oxide
Heat-barrier material；High temperature insulating layer (13) is supported using the molybdenum plate (3) of annular.
7. a kind of PWR Fuel cluster high-temperature heating clamping experimental provision according to claim 6, which is characterized in that high
It is provided with mechanical pump (28) and lobe pump (29) on the outside of warm melting furnace (36), mechanical pump (28) is connected with lobe pump (29), Roots
It is connected inside pump (29) and high temperature smelting furnace (36), rhenium molybdenum electrode (16) one end is located in high temperature smelting furnace, and one end is located at height
Outside warm melting furnace, rhenium molybdenum electrode (16) is located at one end outside high temperature smelting furnace and is connected with water cooling copper electrode (12).
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| CN110231224B (en) * | 2019-06-26 | 2023-10-27 | 南京航空航天大学 | Device and method for testing residual tensile strength of ceramic fiber after uniform oxidation |
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